ଯଦି (a 3 + b 3 + c 3 - 3abc) = 405, ଏବଂ (a - b) 2 + (b - c) 2 + (c -a) 2 = 54, ତେବେ (a + b + c) ର ମୂଲ୍ୟ  ନିର୍ଣ୍ଣୟ କର | 

1
15
2
45
3
9
4
27

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